of swissvale



Feb. 3, 1931. c. A. BROOKS I RAILWAY TRAFFIC CONTROLLING APPARATUS Filed May 17, 1929 a KQ BQ K um N INVENTOR f Q C19. Brooks,

Patented Feb. 3, 1931 UNITED; STA E CHARLES A. BROOKS, or. SWISSVALE, PENNSYLVANIA, AssIGnon TO THE. UNION:

PATENT oFFicE' SWITCH & SIGNAL COMPANY, OF SWJES SVALE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA nnnwnYf-Tnarrrccorirnonmne APPARATUS Application ar a May 17,

My invention relates to railway traflic controlling apparatus, and has for an object the provision of novel and improved means for the control of traffic over stretches of single track between passing 'sidings. c

I will describe one'form ofapparatus embodying my invention ,a-nd will then point out the novel features thereof in'claims' The accompanying drawing is 'a diagrammatic View showing oneform of. apparatus embodying myinvention. I

Referring to the drawing, the reference characters 1 and 1 designate the track rails of a stretch of railway trackover which tralfic at'times moves in both directions. These r'ails'are divided by insulated oints2 to form a block A- B, and the rails of this block are further divided by similar insulated joints to form aplur ality ofltrack sections AX, XY and Y-.B. a

Located at the point this a' signal S? which governs trafiic" moving, toward the right through the block AB, whereas,tr;afiic mov in toward the left through this block isgoverned by a similar si'gnal'r S located at the point B. Each of'the'se signals comprises a proceed lamp G, a caution lamp Y, and a stop lamp R, as ,wellas an auxiliary stop lampR v.

Located at the point A is a selector relay G andlocated at the point' B is a similar selector relay C 'These relays arercon-' trolled from a distant point through the medium of a despatchers control :line G and, selectors F and F The control of these relays forms no part of my presentinvention,

and it is sufficient to state that each relay is normally de-energized but that either relay may be energized at the will of the desp atcher through the medium of the-selectors Each end of each track sectionis proyided. with a track battery-and a trackrelay; The track batteries are designated E E etc., whereas, the track relays are designated T, T etc. The battery E? and the relay T are associated with the right-hand end of section AX, the battery E and relay Ta a-re associated with the left-hand end of section XY, the battery E and relay T are associated with the right-hand end ofsection 1929. Serial no. 363,817.

XY, and the battery E and therelay T battery E and-relay T are associated with the left-hand endof section A,X,- whereas,

the battery E and re-la'yT are associated" 7 with the right-hand end of section-Y)B .As shown inthe drawing,flboth of the selector relays O and C are deen'ergized. Battery E isconnected with section A -B, the

path being from the upper termina l of this battery through the back point of, contact. 3

of relay C to track rail 1, and from track.

rail 1 throughthe back point of contacts of relay C back contact 11 0f a stick relay j D and back contact of track relay T to battery E Track relay'l is connected with the rails of section A-X, through the back points of contacts15 and 16 of track relay 1 T so that track relay T is energized. Bat-,1

tery E is thereforeconnected with the rails of section X,Y through the front points of contacts 13 and Hot track relay T so that trackr'elay T is energized, the latter relay ber ing connected with the rails of section XY- YV through the backpoints of contacts 19 .and2O oftrack'relay T 1 Battery E 'is connected with the rails of section Y-B through the front pointsof contacts 17 and 18' of track relay Th Batterywlll is also 'connectedlwithq the rails :of section Y B through theback point of contact 21 0f relay C back-point of contact 22 of relay CB, back contact 28 of a stick relay D andback contact 3O of track relay T. Track relaysT T T and TKare disconnected from the rails.

Lamp R- 'of signal S is lighted, the circuit being from terminal 113 of a suitable source of current, through'the backpoint of contact 8 of relay T and lamp Rto terminal Oof the same source of current: Lamp" R of this signal is also lighted through a circuit which includes the back pointof contact 12 of relay D Lamp R of signal S is lighted by virtue of a circuit which includes the back point of contact 26 ofrelay T Lamp R of signals is also lighted fbly, Virtue-of a circuit which includes the backpoint of contact 29 of rel y tea lay T with the rails of this section through the front points of contacts 21 and 22 of relay C Track relay T will then become en'er-' gized, because track battery is connected With the rails of this section. A pick-up circuit for relay D will then be closed, which circuit passes from terminal, B, through contact 24 ofrelay T, and the winding of relay D to terminal O. The stick circuit for relay' D will then become closed, which circuit passes from terminal B, through contact 23 of relay C contact 27 of relay D and the. winding of relay D3 to terminal 0.

It follows that relay D will remain energized as long as selector relay C remalns energized, even though. track relay T may v open.

The'circuit for the stop lamp R of signals will then become opened at the back point of contact 25 of relay T", but the auxiliary lamp R of this signal will remain lighted because of second circuit train enters section X.Y, it will de-energize track relay T thereby disconnecting battery which includes the front point of the same contact. he proceed lamp G of signal S 'will become lighted by virtue of a circuit which passes fron terminal B, through the front point of contact 29 of relay D front point of contact 26 of relay T and lamp G to terminal 0. When the train enters'sec tion Y'B, track relay T will become deenergized, whereupon, the proceedlamp G of signal S will be extinguished, and the caution lamp of'this signal will become lighted because ofa circuit including the track divided into sections, a track battery and a track relay associated "with each end front point of contact 29 of relay D and'the baek'point of contact 26 of relay T. As the Etfrom the rails of section Y B, and as the train] enters" section i AX it will tie-energize track relay T?,'th'er'eby disconnecting battery E from theirails of section X Y.- It fol lows that signal-S will continue to give the g caution indication as lon as'the tram occupies any part of block A B.

If the despatcher desires to permit atr'ain'; moving toward the right toenter block Ja -B, I

gized or energized, and signals for sa1d he causes selector relay C to become energized, thereby connecting track relay T with the rails of section AXQ Track relay T will then be energized frombattery E, track I track'dlvlded lnto sections, a track battery relay T Will beenergized from battery E and track relay T willbe energized from battery E It follows that stick relay D will become energized by virtue of its pick-cup circuit through contact 6 of track relay T and willthen remain energized by virtue of [its stick circuitthr'ough contact 50f relay C and contact 10 of relay D The proceed lamp G of signal S will become lighted by lighted by Virtue of a circuit through the front point of thecontact 12 of relay D 'and the back point ofcontact. 9 of track'relay T This condition will continue as the'train passes through the block for reasons pointed out hereinbefore in explaining the operation duringthe movement of a train in the opposite direction. t

Although I have herein shown and described only one form of apparatus embodying my invention, it is understood that variouschangesrand modifications may b'e made therein wlthin the scope o-fthe appended claimswithout departing from thespirit and scope of my invention. Having thus describedmy invention, what Iclaimis: r

1. In combination, 'astretch of railway track divided into sections, a track battery and a track relay associated with each end of each section, means for co'nnectlng the rails of each end of each two ad o 1n1ng sections with'the associated battery or theassociatedrelay according as-the relay for the adacent end of the ad oining. section s energized ,or deeenergized, manually controlled means for selectively connecting the rails atthe free end of each end section with the Y associated battery or the: associated relay, and

signals for said stretch controlled by the track relays associated'with the free ends of the 7 ,end sections.

2. In combination, a stretch of railway de-energized, a manually controlled relay at each end of sald stretch, means forconnectmg therails at the free end of each end section with the associatedcbattery or the associated. track relay according-as the associated manuallycontrolled relay isde-enen stretch controlled by the 'track'relays associatedwith the free ends of the end sections' :3. In combination, a stretch of railway and track relay associated with each end of each sect1on, means for connecting the rails of each end of each two ad o1ning sections with the associated battery or the associated relay accordingas the relay for the adjacent end of the adjoining section is energized or deenergized, a manually controlled relay at each end of said stretch, means for connect ing the rails at the free end of each end section with the associated battery or the associated track relay according as the associated manually controlled relay is de-energized or energized, a stick relay at each end of said stretch, a pickup circuit for each stick relay controlled by a front contact of the track re lay for the free end of the associated section, a stick circuit for each stick relay controlled by a front contact of the associated manually controlled relay, and signals for said stretch controlled by said stick relays and by the track relays associated with the free ends of said end sections.

4. In combination, a stretch of railway track divided into sections, a track battery and a track relay associated with each end of each section, means for connecting the rails of each end of each two adjoining sections with the associated battery or the associated relay according as the relay for the adjacent end of the adjoining section is energized or de-energized, a manually controlled relay at each end of said stretch, means for connecting the rails at the free end of each end section with the associated battery or the associated track relay according as the associated manually controlled relay is de-energized or energized, a stick relay at each end of said stretch, a pick-up circuit for each stick relay controlled by a front contact of the track relay for the free end of the associated section, a stick circuit for each stick relay controlled by a front contact of the associated manually controlled relay, a signal at each end of said stretch, means for causing each signal to indicate proceed when the associated stick relay and the associated track relay are energized, means for causing each signal to indicate caution when the associated stick relay is energized and the associated track relay is de-energized, and means for causing each signal to indicate stop when the associated stick relay is de-energized.

In testimony whereof I aflix my signature.

CHARLES A. BROOKS. 

